Wrench.



A- BRANDETTI.

WRENCH. APPLICATION FILED OCT. 1. 1915- Patented Nov. 23, 1915.

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Specification of Letters Patent.

Patented Nov. 23., 1915.

Application filed October 1, 1915. Serial No. 53,538.

To all whom it may concern:

Be it known that I, ALBERTO BRANDETTI, a subject .of the King of Italy, residing at Dei troit, in the county of IVayne and State of Michigainhave invented certain new and useful Improvements in Wrenches, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to'wrenches, and the primary object of my invention is to pro vide a simple, durable and inexpensive nut wrench having jaws that can be easily and quickly adjusted and locked in adjusted position to preclude any danger of their slip ping when in use.

A further object of my invention is to provide a wrench consisting of parts that can be quickly assembled and maintained in operable relation.

The mechanical construction by which I attain the above and other objects will be hereinafter specifically described and then claimed, and reference will now be had to the drawing, wherein- Figure 1 is a plan of a portion of the wrench, partly broken away and partly'in section; F 2 is a longitudinal sectional view of a portion of the wrench; Fig. 3 is a perspective view of a locking member of the wrench; Fig. 4: is a similar view of another part of the locking member of the wrench, Fig. 5 is a cross sectional view taken on the line VV of Fig. 2, and Fig. 6 is a perspective view of a wrench head.

In thedrawing, 1 denotes a wrench head having a fixed or stationary jaw 2 at one end thereof presenting a flat gripping surface 3. The head 1 has a transverse guidevay 4 with one of the walls thereof provided with a longitudinal tongue 5. The head 1 has open sides 6 and 7 and opposed segment racks 8 at the open side 7 of the head, said segment racks having alining openings 9.

Slidable in the guideway 4 is the shank 10 of an adjustable iaw 11 presenting a flat gripping surface or face 12 confronting the jaw 2. The shank 10 has a longitudinal groove 13 to receive the tongue 5 of the head 1, said tongue and groove preventing'accr dental displacement of the shank 10 within the guideway 4C. The shank 10 has a straight rack 14 and after said shank is placed in the guideway 4:, a pin 15 is placed transversely of the guideway to limit the movement of the shank 10 in one direction by the straight rack engaging said pin, and this same pin prevents the rack 10 from being shifted completely out of the guideway.

Pivotally mounted between the segment racks 8 of the head 1, by a pin 16, is the outer end of a flat wrench handle 17 which may be of any desired length. The outer end of the wrench handle is toothed, as at 18, and meshes with the straight rack 14:, whereby theshank 10 can be shifted in the guideway 4 by an oscillatory movement of the wrench handle.

Contiguous to the outer end of the wrench handle 17 is a cylindrical enlargement 19 provided with screw threads 20 and opposed longitudinal grooves 21. Extending into the grooves 21 are parallel arms 22 of a lookng member composed of a housing 23 having a detachable plate 24 held in said housing by screws or other fastening means. The locking member embraces the outer end of the wrench handle and the housing and plate of said member are provided with series of teeth 25 adapted to engage the segment racks 8 and lock the wrench handle relative to the head 1, thus preventing the adjustable jaw 11 from slipping relative to the stationary jaw 3 while the wrench is in use.

The arms 22 of the locking member have detachable studs 26 engaged by a knurled nut 27 screwed upon the threaded enlarge ment 19 of the wrench handle. The nut 27 when rotated, is adapted to engage the studs 26 to retract the locking member or shoulders 28 of the locking member to fix the adjustable locking member.

With the locking member out of engagement with the segment racks 8 of the wrench head 1, the handle 17 can be oscillated to easily move the adjustable aw 11 to and from the stationary or fixed jaw 2, whereby a nut or object having fiat facets can be easily gripped or released. After the jaws of the wrench have been placed in engagement with the nut, the locking member can be shifted into engagement with the segment racks 8 by rotating the nut 27 into I- -Z engagement with the shoulders 28, then it is impossible for the adjustable jaw to slip relative to the fixed jaw.

The wrench is made of strong and durable metal. and by providing the confronting faces of the jaws 2 and 11 with serrations pr teeth, the Wrench may be used for rotat;

ing pipes or objects having smooth and rounded surfaces.

What I claim is 1. A Wrench comprising a head provided with a fixed jaw and a longitudinal guideway, an adjustable jaw having a shank slidablein the 'guideway of said head and formed with a straight rack, segment racks carried by said head, a handle having L; atoothed outer end pivotally mounted between the segment racks of said head and meshing with the straight rack of the shank of said adjustable jaw, a threaded enlargement on said handle, a locking member slid- A able on said handle having teeth adaptedto having a shank slidable in the guideway of said head and provided with a straight rack, segment racks carried by said head, a handle having an outer toothed end pivotally mounted between said segment racks and meshing with the straight rack of said adjustable jaw, a threaded enlargement on said handle, a locking member having arms slidable in said enlargement and having teeth adapted to engage the segment racks of said head and hold said handle in ad- 35 justed position, and a nut on said threaded enlargement adapted to move said locking member to and from said segment racks.

3. A wrench comprising a head provided with a guideway, a fixed aw carried thereby, an adjustable jaw having a shank slidable in the guideway of said head, means carried by said head to limit the movement of said shank in one direction, a straight rack forming part of said shank, segment racks carried by said head, a handle having a toothed outer end pivotally mounted be tween the segment racks of said head and adapted to adjust said shank relative to said head, a threaded enlargement on said handle provided with longitudinal grooves, a looking member slidable on said handle and having arms extending into the grooves of said threaded enlargement, teeth forming part of said locking member and adapted to engage said segment racks to hold said handle in adjusted position relative to said head, and a nut screwed on said threaded enlargement and maintained in engagement with said locking member to hold said member in engagement with said segment racks.

In testimony whereof I aflix my signature in presence of two witnesses.

ALBERTO BRANDETTI.

Witnesses:

KARL H. BUTLER, RALPH PIGLIOTTI.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. G. 

